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Visual saliency-based fast intracoding algorithm for high efficiency video coding

[+] Author Affiliations
Xin Zhou, Wei Zhou, Zhemin Duan

Northwestern Polytechnical University, School of Automation, Xi’an, Shaanxi, China

Guangming Shi

Xidian University, School of Electronic Engineering, Xi’an, Shaanxi, China

J. Electron. Imaging. 26(1), 013019 (Feb 22, 2017). doi:10.1117/1.JEI.26.1.013019
History: Received August 30, 2016; Accepted February 2, 2017
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Abstract.  Intraprediction has been significantly improved in high efficiency video coding over H.264/AVC with quad-tree-based coding unit (CU) structure from size 64×64 to 8×8 and more prediction modes. However, these techniques cause a dramatic increase in computational complexity. An intracoding algorithm is proposed that consists of perceptual fast CU size decision algorithm and fast intraprediction mode decision algorithm. First, based on the visual saliency detection, an adaptive and fast CU size decision method is proposed to alleviate intraencoding complexity. Furthermore, a fast intraprediction mode decision algorithm with step halving rough mode decision method and early modes pruning algorithm is presented to selectively check the potential modes and effectively reduce the complexity of computation. Experimental results show that our proposed fast method reduces the computational complexity of the current HM to about 57% in encoding time with only 0.37% increases in BD rate. Meanwhile, the proposed fast algorithm has reasonable peak signal-to-noise ratio losses and nearly the same subjective perceptual quality.

© 2017 SPIE and IS&T

Citation

Xin Zhou ; Guangming Shi ; Wei Zhou and Zhemin Duan
"Visual saliency-based fast intracoding algorithm for high efficiency video coding", J. Electron. Imaging. 26(1), 013019 (Feb 22, 2017). ; http://dx.doi.org/10.1117/1.JEI.26.1.013019


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